Weizmann Institute of Science -- Antioxidants are sold over the counter everywhere. They’re added to food, drink and face cream. But according to Prof. Nava Dekel of the Biological Regulation Department, we still don’t have a complete understanding of how they act in our bodies. New research by Dekel and her team, recently published in the Proceedings of the National Academy of Sciences USA (PNAS), has revealed a possible unexpected side effect of antioxidants: They might cause fertility problems in females.